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(No Model.) 4 Sheets-Sheet 1.

J. R. MORGAN.- OVERHEAD TRAVELING CRANE.

- No. 522,913. Patented July 10, 1894.

(. 4 Shets-Shee 2.

.J.RQMORG A N. OVERHEAD TRAVELING GRA NE.

No. 522,913. Patented July 10 1894.

(No Model.) 4 Sheets-Sheet 3. J. R. MORGAN. OVERHEAD TRAVELING CRANE.

N0. 522,913. Patented July 10, 1894.

attozwwi mum WASHXNGTOM o c (No Model.) 4 Sheets-Sheet 4.

J. R. MORGAN.

OVERHEAD TRAVELING CRANE. No. 522,913. Patented July 10, 1894.

3o ing my invention.

UNiTED STATES PATENT Orrroe.

JOHN R. MORGAN, OF ALLIANCE, OHIO, ASSIGNOR OF THREE-FOURTHS TO THOMASR. MORGAN, SR, THOMAS R. MORGAN, JR, AND WILLIAM H.

MORGAN, OF SAME PLACE.

OVERHEAD TRAVELING CRANE.

SPECIFICATION forming part of Letters Patent No. 522,913, dated July 10,1894.

Application filed November 25, 1893. Serial No. 491,941. (No model.)

To all whom it may concern.-

Be it known that 1, JOHN R. MORGAN, of Alliance, in the county of Starkand State of Ohio, have invented certain new and usefulImprovementsinOverheadTraveling Cranes; and I do hereby declare thefollowing to bea full, clear, and exact description of the inventlon,such as will enable others skilled in the art to which it appertains tomake and use [0 the same.

My invention relates to an improvement in overhead traveling cranes, andit consists in traveling trolley carrying a hoisting rack My inventionfurther consists in a travel- 111g trolley, a rack bar carrying tongs orother devices for engaging ingots, &c., and means for moving said rackbar vertically.

My invention further consists in a travel- :0 ing trolley, a hoistingrack bar, an actuating pinion engaging the rack bar, and guiding andsupporting rollers engaging said rack bar above and below the point ofengagement therewith of the driving pinion.

My invention further consists in the parts and combinations of parts aswill be more fully described and pointed out in the claims.

In the accompanying drawings, Figure l is a View in side elevation of atrolley embody- Fig. 2 is an end view of same and Fig. 3 is a plan view.Fig. 4: is a longitudinal sectional view of the rack bar,- and Figs. 5,6, 7, 8, 9, and 11 are views in cross section thereof.

A represents a trolley frame mounted on flanged wheels at, a, whichlatter are adapted to travel on rails secured on the upper face ofatraveling bridge not shown. This trolley can be of any preferredconstruction and 0 shape, and is preferably provided at one end with anelevated platform B, carried on supports Cand braced as at b. Thisplatform or cage is for the use of the operator, and earries the leversor other devices by which the 5 movements of the bridge trolley and rackbar are controlled by the operator. The trolley is propelled back andforth on the bridge by the motor and gearing which are clearly shown inFig. 3. The motor D is provided on its armature shaft with a pinionwhich latter meshes with a larger pinion on shaft 1, both of saidpinions being inclosed by gear casing 2. Shaft 1 carries pinion 3 whichin turn meshes with toothed wheel 4 fast on shaft 5. This shaft 5extends crosswise the trolley and is provided near its opposite endswith pinions 6 meshing with toothed wheels 7--fast on the flanged trackwheels a. By means of this motor and gearing the trolley can be movedback and forth on the bridge irrespective of the movements of the otherparts of the apparatus.

The floor or platform of the trolley is provided centrally with anopening for the passage of the rack bar E which is preferably made ofcast steel, hollow and ribbed transversely, and longitudinally ifnecessary throughout its entire length, and is provided on one face withteeth 2 and at its lower end with an openingfor the insertion of a postcarrying the tongs. The post and the tongs form no part of thisinvention but are fully shown, described and claimed in application,Serial No. 476,498, filed by Thomas R. Morgan, Sn, and William H.Morgan, June 3, 1893.

Each face of the rack bar excepting the toothed face is groovedlongitudinally as at f leaving narrow flat bearing faces for the rims fof the supporting rollers G. These rollers G are arranged in two seriesof four each, one series of rollers located in, approximately ahorizontal plane above the platform or floor of the trolley, andsupported by the upwardly extending brackets H. Each bracket H car- 8 5ries a rigid axle h on which its respective roller is mounted, the fourrollers constituting the series completely embracing the rack bar andpreventing the vibration or rotation of same.

By grooving or channeling the bar, and constructing the rollers withrims to engage the narrow faces at the sides of the channels the bar issupported solidly against movement while the friction produced by thecontacts is 5 reduced to a minimum. These upper supporting rollers arelocated at considerable elevation above the platform or floor of thetrolley, and depending from the under side of the trolley is a series ofbrackets I-I four in num- :00

ber, each of which carries at its lower end'an axle 72 carrying a rollerG, the lower rollers embracing the four sides of the rack bar andeffectually supporting same at a point below the trolley. These rollersas before stated effectually hold the rack bar solidly in position andprevent tilting and turning of the bar, and in fact prevent allindependent movement except a direct vertical movement as in hoisting.

The rack bar carries at its lower end a post the upper end of which isswiveled to the bar while the lower end carries tongs or other devicesordinarily employed for grappling or lifting loads of various kinds.This post carries a pinion 10 which is engaged by the pinion 11 on shaft12; By turning the shaft which is connected by suitable mechanism to anoperating device in the operators cage, the post with the grapplingdevice can be turned to bring the hooks or tongs into position to engagethe object to be lifted.

The rack bar is actuated vertically by the motor I, which with itsgearing is also shown in Fig. 3. This motor is provided on its armatureshaft with a pinion 13 which meshes with pinion 14 both of which areincased in the gear casing 15. The shaft carrying pinion let is alsoprovided with pinion 16 which meshes with toothed wheel 17 fast on shaft18. This shaft 18 as clearly shown in Fig.1 is located well down to thefloor or platform of the trolley and is provided with the pinion 19engaging the teeth of the rack bar. By this arrangement it will be seenthat the pinion for actuating the rack bar is located well down on thetrolley and between the upper and lower series of guiding rollers. Ifdesired I can provide the rack bar with teeth on two or more sides, butI find in practice that a bar provided with teeth on one side, andsupported solidly above and below the actuating pinion, answers allpurposes and is considerably less expensive.

1 have also referred to the crane as an ingot crane, but I would have itunderstood that a traveling crane provided with a hoisting rack bar isWell adapted for foundry purposes and particularly for hoisting ladlesof molten metal, as the rigid rack bar prevents all swaying of the ladleexcept'such'as would naturally result from the loose connection betweenthe holding or carrying device on the rack bar and the bail.

It is evident that many slight changes might be resorted to in therelative arrangement of parts herein shown and described withoutdeparting from the spirit and scope of my invention hence I would haveit understood that I do not confine myself to the exact constructionshown; but,

Having fully described my invention,what I claim as new, and desire tosecure by Letters Patent, is

1. In an overhead traveling crane the combination, with a travelingtrolley,,of a rack bar carried by the trolley, a pinion engaging saidrack bar for moving same vertically, means for actuating the pinion,devices located above and below the bar actuating pinion for holdingsaid bar against lateral movement, an operators cage carried by thetrolley and means in said cage for regulating the movements of thetrolley and rack bar, substantially as set forth.

2. In a'craue, the combination with an overhead trolley and means forpropelling same, of a series of brackets extending upwardly from saidtrolley, a series of brackets projecting downwardly from said trolleys,rollers carried by said brackets and forming guides, a rack bar passingupwardly through the trolley and between the guides, and means locatedbetween the guides for actuating the rack bar.

3. In a crane, the combination with a traveling trolley and means forpropelling same, of a rack bar having teeth on one face and grooves orchannels on its other facesa driving pinion engaging the teeth of therack bar, and guides engagingthe rack bar outside the channels,substantially as set forth.

4. In a crane the combination with a traveling trolley having two seriesof brackets, one series extending upwardly and the other downwardly androllers carried by said brackets the said rollers adapted to engage rackbar near the side edges of the latter, driven shaft located near thefloor or platform of the trolley and a pinion on said shaft and mesh ingwith teeth of the rack bar, substantially as set forth.

5. In a crane, the combination with atraveling trolley and means forpropelling same, of a rack bar, rack bar actuating pinion, a motor andgearing for actuating said pinion, rollers supporting said bar abovesaid actuating pinion, rollers supporting said bar below said actuatingpinion, an operators cage carried by the said trolley and means in saidcage for regulating the movements of the trolley and rack bar.

In testimony whereof I have signed this specification in the presenceof'two subscribing witnesses.

JOHN R. MORGAN.

Witnesses:

H. W. HARRIS, A. W. BRIGHT.

